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Gene Rearrangements in the Mitochondrial Genome of Gonatopsis borealis and Onychoteuthis compacta Reveal Their Phylogenetic Implications for Oegopsida

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Abstract

The complete mitochondrial genome provides crucial information for comprehending gene rearrangement, molecular evolution, and phylogenetic analysis. Here, we have determined the complete mitogenome sequence of Gonatopsis borealis and Onychoteuthis compacta for the first time. Their genome sizes were 20,148 bp and 20,491 bp, respectively, including 18 protein-coding genes, COI-COIII, ATP6, and ATP8 are duplicated, 23 transfer RNA genes, and 2 ribosomal RNA (rRNA) genes (12S and 16S rRNA). Specifically, the overall A+T content is 70.69% and 72.67%. It shows a significant AT bias. The whole mitogenomes indicate positive AT skew (0.070 and 0.062). Furthermore, the gene order has been rearranged within Oegopsida. The tandem duplication random loss model was determined as most likely to explain the observed gene rearrangements. Phylogenetic analysis was performed, and the result tree was found to be consistent with the morphological identification classification. Estimation of divergence time for 35 species showed that the main differentiation of Oegopsida occurred in 140.70 Mya. These results will help to better understand the gene rearrangements and evolution of G. borealis and O. compacta and lay a foundation for further phylogeny genetic studies of Oegopsida.

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Acknowledgements

This work was supported by Program on the Survey, Monitoring and Assessment of Global Fishery Resources (Comprehensive scientific survey of fisheries resources at the high seas) sponsored by the Ministry of Agriculture and Rural Affairs; Zhejiang Provincial Natural Science Foundation of China (Grant No. LY20C190008).

Funding

Funding was provided by Zhejiang Provincial Natural Science Foundation of China (Grant No. LY20C190008), Program on the Survey, Monitoring and Assessment of Global Fishery Resources (Comprehensive scientific survey of fisheries resources at the high seas) sponsored by the Ministry of Agriculture and Rural Affairs.

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LJ conceived this research and designed the experiment. FF and LP performed experiments. FF, LJ, LP, YY, YFL, BL analyzed data. FF and LJ wrote the manuscript. All authors read and approved the manuscript.

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Correspondence to Lihua Jiang.

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Fan, F., Pei, L., Jiang, L. et al. Gene Rearrangements in the Mitochondrial Genome of Gonatopsis borealis and Onychoteuthis compacta Reveal Their Phylogenetic Implications for Oegopsida. Biochem Genet (2024). https://doi.org/10.1007/s10528-024-10707-7

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  • DOI: https://doi.org/10.1007/s10528-024-10707-7

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